TSI Practice Flashcard 3

Front

What is the square of a binomial?

Back

The square of a binomial is the result of multiplying a binomial by itself. For example, (a + b)² = a² + 2ab + b².

Front

Expand the expression (7r + 6)(7r + 6).

Back

49r² + 84r + 36.

Front

What is the median in a data set?

Back

The median is the middle value when the numbers are arranged in order. If there is an even number of observations, the median is the average of the two middle numbers.

Front

If the median of a set of scores is 27, what does that imply about the scores?

Back

At least half of the scores are less than or equal to 27, and at least half are greater than or equal to 27.

Front

How do you calculate the mean of a set of numbers?

Back

The mean is calculated by adding all the numbers together and dividing by the total count of numbers.

Front

What is the mean temperature of the following data set: 68, 68, 69, 70, 72, 70, 68, 75, 55, 67?

Back

The mean temperature is 68.

Front

What does it mean for two expressions to be equivalent?

Back

Two expressions are equivalent if they have the same value for all values of the variables involved.

Front

Which expression is NOT equivalent to 28x - 14?

Back

2(14x - 14) is NOT equivalent.

Front

What are the factors of the quadratic expression x² + 9x - 36?

Back

The factors are (x + 12)(x - 3).

Front

What is a factor in mathematics?

Back

A factor is a number or algebraic expression that divides another number or expression evenly.